/*!
  依赖 jQuery 1.5.2 
  (c) 2016 
  license: http://www.opensource.org/licenses/mit-license.php
*/
(function($){
$.fn.imgPreviewQs = function(options){
  function isIE(ver){
    var b = document.createElement(\'b\')
    b.innerHTML = \'<!--[if IE \' + ver + \']><i></i><![endif]-->\'
    return b.getElementsByTagName(\'i\').length === 1;
  }
   
  options = $.extend( {}, $.fn.imgPreviewQs.defaults,options);
  var $this =$(this);
  $this.change(function(){
    var regex=/(.*)\\.(jpg|jpeg|gif|bmp|png)$/;
    var val = $this.val();
    if(!regex.test(val)){
      alert(\"请选择图片\");
      return false;
    }
    if(browserQs.isIE(8)){
      HanderIE789($this);
    }
    else if(window.FileReader){
      HanderFileReader($this);
    }
    else if(browserQs.isIE(9)){
      HanderIE789($this);
    }
    else if(browserQs.isIE(6)){
      HanderOther($this);
    }
    else if(browserQs.isIE(7)){
      HanderIE789($this);
    }
    else{
      $(\"#\"+options.destID).html(\"浏览器不支持预览图片\");
    }
  });
   
  function HanderFileReader($this){
    var oPreviewImg = null, oFReader = new window.FileReader(),
    rFilter = /^(?:image\\/bmp|image\\/cis\\-cod|image\\/gif|image\\/ief|image\\/jpeg|image\\/jpeg|image\\/jpeg|image\\/pipeg|image\\/png|image\\/svg\\+xml|image\\/tiff|image\\/x\\-cmu\\-raster|image\\/x\\-cmx|image\\/x\\-icon|image\\/x\\-portable\\-anymap|image\\/x\\-portable\\-bitmap|image\\/x\\-portable\\-graymap|image\\/x\\-portable\\-pixmap|image\\/x\\-rgb|image\\/x\\-xbitmap|image\\/x\\-xpixmap|image\\/x\\-xwindowdump)$/i;
    oFReader.onload = function (oFREvent) 
    {
      $(\"#\"+options.destID).html(\"<img src=\'\"+oFREvent.target.result+\"\' style=\'width:100%;height:100%;\'/>\");
    };
     
    var aFiles = $this.get(0).files;
    if (aFiles.length === 0) { return; }
    if (!rFilter.test(aFiles[0].type)) { alert(\"请选择图片\"); return; }
    oFReader.readAsDataURL(aFiles[0]);
  }
   
  function HanderIE789($this){
    $(\"#\"+options.destID).css(\"filter\",\"progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale,src=\'\"+getUrl($this)+\"\')\");
  }
   
  function HanderOther($this){
    $(\"#\"+options.destID).html(\"<img src=\'\"+$this.val()+\"\' style=\'width:100%;height:100%;\'/>\");
  }
   
  function getUrl($this){
    $this.select();
    $this.blur();
    var imgSrc =document.selection.createRange().text;
    document.selection.empty();
    return imgSrc;
  }
}; 
$.fn.imgPreviewQs.defaults = {
    destID:\"\"
};
})(jQuery);